Concise Bible Dictionary:
Temporary habitations made of branches of trees, used especially at the Feast of Tabernacles, (Lev. 23:42, 4342Ye shall dwell in booths seven days; all that are Israelites born shall dwell in booths: 43That your generations may know that I made the children of Israel to dwell in booths, when I brought them out of the land of Egypt: I am the Lord your God. (Leviticus 23:42‑43); Neh. 8:14-1714And they found written in the law which the Lord had commanded by Moses, that the children of Israel should dwell in booths in the feast of the seventh month: 15And that they should publish and proclaim in all their cities, and in Jerusalem, saying, Go forth unto the mount, and fetch olive branches, and pine branches, and myrtle branches, and palm branches, and branches of thick trees, to make booths, as it is written. 16So the people went forth, and brought them, and made themselves booths, every one upon the roof of his house, and in their courts, and in the courts of the house of God, and in the street of the water gate, and in the street of the gate of Ephraim. 17And all the congregation of them that were come again out of the captivity made booths, and sat under the booths: for since the days of Jeshua the son of Nun unto that day had not the children of Israel done so. And there was very great gladness. (Nehemiah 8:14‑17)). Jonah made himself such a shelter (Jonah 4:55So Jonah went out of the city, and sat on the east side of the city, and there made him a booth, and sat under it in the shadow, till he might see what would become of the city. (Jonah 4:5)). They were also used for cattle (Gen. 33:1717And Jacob journeyed to Succoth, and built him an house, and made booths for his cattle: therefore the name of the place is called Succoth. (Genesis 33:17)). The Hebrew is succoth.
Modern booths during Sukkot.